Path: utzoo!utdoe!generic!pnet91!taob
From: taob@pnet91.cts.com (Brian Tao)
Newsgroups: comp.sys.apple2
Subject: Homebrew digitizer
Message-ID: <556@generic.UUCP>
Date: 5 Mar 91 22:00:06 GMT
Sender: root@generic.UUCP
Organization: People-Net [pnet91], Etobicoke, ON
Lines: 49


    Someone recently handed me a buffered post from comp.sys.mac.hardware.  It
was posted by Mike Ciholas (mikec@allspice.lcs.mit.edu).  He has started up a
small business selling "shareware hardware":  inexpensive hardware kits which
are available for much less than their commercial counterparts.  He was
describing his new product:  an external digitizer for the Macintosh. 
Although it feeds into the Mac's serial port, I think it can be easily
modified to fit the GS's Molex connector so existing applications can take
advantage of it.

    From his post, it seems it would work well with the GS with minimum fuss. 
Here is his list of features (extracted from the message):

Features
--------

The CSD has the following features (unique features are '*'):

- digitizes sounds at 22254 samples per second at 8 bit resolution.

- uses one serial port

- requires no external power supply or batteries

- works with all Macintoshes

- is compatible with commercial digitizers and software

- has manual volume control

* has selectable automatic leveling control with adjustable set point

* uses a 5 pole, 4 zero elliptic anti-aliasing filter for superb quality

* uses a sample-and-hold circuit for better high frequency fidelity

* has a two-color LED indicator which some programs support

* two CSDs can be synchronized for perfect stereo sampling

     I would like to see how "quiet" this digitizer is compared to the Sonic
Blaster or HyperStudio digitizer.  There have been complaints about the amount
of background hiss and distortion with commercial GS digitizers, so I thought
perhaps this might be a solution.  I haven't been able to get mail out to him
at allspice, but my latest attempt seems to hav gone through.  Again, his
Internet address is mikec@allspice.lcs.mit.edu if you want more info.

Brian T. Tao   *B-) |  t569taob@bluffs.scar.utoronto.ca  | "Though this be
U of Metro Toronto  |               - or -               |  madness, yet there
Scarberia, ON       |        taob@pnet91.cts.com         |  is method in 't."